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Date: Tue, 24 Oct 2023 19:02:48 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
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Subject: Re: [PATCH  v2 1/6] x86/bugs: Add asm helpers for executing VERW
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On Tue, Oct 24, 2023 at 09:45:20AM -0700, Pawan Gupta wrote:

> > > modules being within 4GB of kernel.

FWIW, it's 2G, it's a s32 displacement, the highest most address can
jump 2g down, while the lowest most address can jump 2g up. Leaving a 2G
directly addressable range.

And yeah, we ensure kernel text and modules are inside that 2G range.